Hamilton County recently issued the following announcement.
The Hamilton County Health Department has identified new and existing locations positive for WNV mosquitoes. Spray will be conducted as weather permits over the next several nights. Please see the Mosquito control page for locations and scheduled spray dates.
As overnight temperatures drop, mosquito activity should decrease. Individuals should continue to use repellent spray and wear long sleeve clothing to prevent mosquito bites.
Original source can be found here.